<ul nz-menu [nzMode]="mode">
  <li routerLinkActive="ant-menu-item-selected" nz-menu-item *ngFor="let tabItem of tabList">
    <a [routerLink]="[tabItem.link]">
      <span>{{ tabItem.name }}</span>
      <span *ngIf="tabItem.alert">( {{tabItem.alert}} )</span>
    </a>
  </li>
</ul>
